Projects  /  03  /  Enxt

Enxt.

A long-tail e-bike for hauling tools, groceries and a second human across town. Aluminium frame, every part designed to bolt onto it. Designed in Onshape, prototype done.

Prototype done Aluminium Onshape
Type
long-tail e-bike
Drive
1800 W · 48 V
Battery
13S8P · 20 Ah
Weight
~35 kg
Enxt long-tail e-bike
ENXT · prototype · 2025
Overview

One bike, every accessory bolted to it.

Prague is hilly. Cars are expensive and we are students. We want a bike that hauls one of us, a second human, two backpacks of tooling and a Saturday market run, comfortably, without melting the rider on a 3 km uphill.

The frame is aluminium. The whole design philosophy is that every part — racks, battery box, kickstand, light mounts — is built to attach to that one frame. Designed in Onshape; first prototype is built and rolling.

Drive is a 1800 W / 48 V motor. Pack is a 13S8P Unit Pack Power assembly at 20 Ah, in-frame.

Photo essay

The build.

Primer coating.
Full assembly, side view.
Driving/motor gear.
Drive bay.
Long-tail rack mount points.
Foot stand welded.
Motor casing.
Headtube.
ASA printed force compensator.
Specifications

The numbers.

FrameAluminium · designed for modular attachments
CADOnshape · full assembly
Wheels26" front · 26" rear
BrakeRake
Motor1800 W · 48 V
Battery13S8P · Unit Pack Power · 20 Ah · in-frame
Total weightcirca 35 kg
Phaseprototype done
Next project · 04 / 07 Feeding Router